He _____ his engagement just before the wedding.
| A．broke out | B．broke away from |
| C．broke off | D．broke up |
The CDs are on sale！Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones |
It’s no use____ that you didn’t know the rules.
| A．you pretend | B．you to pretend | C．of you to pretend | D．your pretending |
At a rough estimate（估计）, Nigeria is ____ Great Britain.
| A．three times the size as | B．the size three times of |
| C．three times the size of | D．three times as the size of |
In face of _______ failure, it is the most important to keep up ________ good state of mind.
| A．不填; a | B．a; 不填 | C．the; 不填 | D．不填; the |
Most of the factories under___________ have been designed by Chinese engineers.
| A．control | B．construction | C．contribution | D． conclusion |